Other titles: Nearest relative; Invisible partner; The Invisible Man” / "Next of Kin
The Earth and its allies are at war with an enemy alliance. Pilot John Limming is captured and becomes a prisoner of war by one of the enemy’s not-so-pleasant races. With nothing better at hand, Limming intends to wage psychological warfare and convince his captors that every human is in contact with an intangible symbiote (known as Eustace) that destroys its enemies.